A vacuum generator for high altitude areas

Abstract

The utility model discloses a vacuum generator for high altitude area relates to rail train accessory technical field. A vacuum generator for high altitude area, including upper casing, lower casing and a plurality of vacuum generator, upper casing and lower casing splicing constitute assembly casing, upper casing top fixed joint quick -plug pipe joint, its inside is equipped with airtight process hole, and the inside of upper casing is separated and is equipped with installation chamber through the wall body in process hole adjacent side, and upper casing outside is equipped with the pagoda joint that communicates with installation chamber, lower casing bottom fixed joint exhaust port, its inside is along length direction and is equipped with the jack -hole that is equal with the number of vacuum generator and penetrates to exhaust port in the outlet of jack -hole extension, and the utility model discloses a lower casing splicing forms assembly casing, and four vacuum generators are integrated and are connected in parallel, and the process hole shunt and the pagoda joint link up the system of setting, realize compressed air efficient distribution and air rapid extraction.

Description

Technical Field

[0001] This utility model relates to the field of rail train accessories technology, specifically to a vacuum generator for use in high-altitude areas. Background Technology

[0002] In the rail transit sector, the stable operation of the vacuum toilet system on high-speed trains directly affects the quality of train operation. The vacuum generator, as the core execution unit of this system, has a crucial structural design and integration method that determines whether the system can adapt to different altitude environments. Currently, the vacuum generators used in the vacuum toilet systems of Fuxing high-speed trains are designed only for low-altitude areas ≤1500 meters above sea level. Their overall structure and integration logic do not consider the special operating conditions at high altitudes, thus failing to meet the operational needs of plateau railways. With the construction and operation of the Sichuan-Tibet Railway, the high-altitude environment has posed severe challenges to the overall performance of vacuum generators. The average altitude of the Sichuan-Tibet Railway is 3800 meters, with the highest reaching 5100 meters. The thin air and low atmospheric pressure in this region directly lead to a significant decrease in the overall efficiency of traditional vacuum generators. Traditional vacuum generators mostly originate from the field of industrial automation, and their design is primarily based on single-function modules. They have not been optimized for the overall application scenarios of high-speed train vacuum toilet systems, and there are currently no dedicated vacuum generator products in the industry with multi-component integration capabilities suitable for high-altitude areas, representing a significant technological gap. From an overall structural design perspective, traditional vacuum generators generally adopt a single-module structure, lacking a systematic integrated assembly design: there is neither a dedicated shell structure to protect and position the core components, nor is performance improved through the collaborative work of multiple components; they rely solely on the independent operation of a single module to achieve vacuum generation. In high-altitude, low-pressure environments, this single-module structure suffers from two major drawbacks: (1) First, the overall airflow control capability is weak, and it is impossible to make up for the kinetic energy loss under low pressure by means of multi-path diversion and precise air path guidance, which leads to a significant reduction in vacuum efficiency. To achieve the target vacuum level of -0.08MPa to -0.09MPa required by the vacuum collection system, the time required increases significantly, which can easily cause the system to frequently report failures due to vacuuming timeout. (2) Secondly, the energy utilization efficiency is low. A single module cannot share the load through parallel connection of multiple components, resulting in a surge in compressed air consumption and additional energy consumption of the train, which is seriously inconsistent with the high-efficiency and energy-saving operation requirements of the Fuxing EMU on the Sichuan-Tibet line. In summary, how to develop a systematic integrated structure with multiple vacuum generators and a dedicated vacuum generator adapted to high-altitude areas has become a technical challenge that urgently needs to be overcome in the current rail transit field.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a vacuum generator for high-altitude areas, thereby solving the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a vacuum generator for high-altitude areas, comprising: an upper shell, a lower shell, and multiple vacuum generators; the upper shell and the lower shell are spliced ​​together to form an assembly shell; The top of the upper housing is fixed with a quick-connect tube connector, which has a sealed process hole inside; the interior of the upper housing is separated from the process hole by a wall and has an installation chamber; the outside of the upper housing is provided with a pagoda connector that communicates with the installation chamber. The bottom of the lower housing is fixed to an exhaust port, which has a number of insertion holes running through it along its length that are equal to the number of vacuum generator holes, and the outlet of the insertion hole extends into the exhaust port. Multiple vacuum generators are assembled in the mounting chamber. Each vacuum generator is inserted into a corresponding socket on one side and penetrates the wall of the upper housing on the other side to communicate with the process hole. The vacuum generator tube wall has air holes that communicate with the internal flow channel of the section corresponding to the installation chamber.

[0006] Preferably, the side of the upper housing is provided with an opening adapted to the process hole, and a plug for sealing the process hole is installed at the opening.

[0007] Preferably, a sealing ring mounting groove is provided on the top of the lower housing, and a sealing ring for sealing the gap between the upper housing and the lower housing is installed in the groove.

[0008] Preferably, a sealing ring is fitted between the vacuum generator and the wall of the upper housing at the penetration position; a sealing ring is fitted between the vacuum generator and the insertion hole of the lower housing.

[0009] Preferably, the upper housing and the lower housing are detachably connected by screws, with four screws distributed at the four corners of the assembled housing.

[0010] The number of vacuum generators is four, and the four vacuum generators are evenly distributed in the mounting chamber along the length of the upper shell.

[0011] Preferably, each vacuum generator consists of multiple vacuum expansion tubes connected in series along the airflow direction; the tube wall of the vacuum expansion tube is provided with air holes that communicate with its internal flow channel.

[0012] Preferably, the vacuum generator is composed of a first-stage expansion tube, a second-stage expansion tube, and a third-stage expansion tube connected in series along the airflow direction; the cross-section of its flow channel is respectively a full-section gradually contracting structure, a full-section gradually expanding structure, and a full-section gradually expanding structure.

[0013] Preferably, on each vacuum generator, only the air vent of the vacuum expansion tube near the process hole is not equipped with a one-way valve, while the air vents of the remaining vacuum expansion tubes are equipped with one-way valves.

[0014] Preferably, the one-way valve uses a rubber valve disc; the edge of the rubber valve disc is provided with a sealing skirt covering the air hole, and the sealing skirt is in contact with the inner wall of the secondary or tertiary expansion tube to increase the sealing area between the rubber valve disc and the tube wall and prevent outside air from leaking from the edge of the valve disc.

[0015] This utility model provides a vacuum generator for high-altitude areas, which has the following beneficial effects: (1) This utility model forms an assembly shell by splicing the upper and lower shells, integrates four vacuum generators to work in parallel, and is equipped with a process hole diversion and a pagoda connector to connect the waste collection system, so as to achieve efficient distribution of compressed air and rapid air extraction.

[0016] (2) The vacuum generator adopts a three-stage expansion tube series connection, differentiated flow channel and one-way valve design to enhance airflow acceleration and sealing and leak prevention at high altitudes, solve the problems of low efficiency and high energy consumption of traditional single modules, greatly shorten the vacuuming time, meet the vacuum and flow requirements of the Fuxing vacuum toilet system on the Sichuan-Tibet line, and adapt to the high-altitude and low-pressure environment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the first cross-sectional angle structure of this utility model; Figure 3 This is a schematic diagram of the second cross-sectional angle structure of this utility model; Figure 4 This is a cross-sectional structural diagram of the vacuum generator in this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] See Figures 1-4To address the problems mentioned in the background section, this utility model provides a vacuum generator for high-altitude areas to solve the aforementioned technical problems. The technical solution is as follows: Example 1: A vacuum generator for high-altitude areas includes: an upper housing 7-1, a lower housing 7-2, and multiple vacuum generators 7-9; the upper housing 7-1 and the lower housing 7-2 are spliced ​​together to form an assembly housing, which is used to assemble multiple vacuum generators 7-9. The top of the upper housing 7-1 is fixed with a quick-connect tube connector 7-3, which has a sealed process hole 7-7 inside; the upper housing 7-1 has an installation chamber 7-1a separated from the process hole 7-7 by a wall 7-1b inside; the upper housing 7-1 has a pagoda connector 7-4 on the outside that communicates with the installation chamber 7-1a. The bottom of the lower housing 7-2 is fixedly connected to the exhaust port 7-6, and the interior of the lower housing 7-2 has a number of insertion holes 7-2a equal to the number of vacuum generators 7-9, and the outlet of the insertion hole 7-2a extends into the exhaust port 7-6. Multiple vacuum generators 7-9 are assembled in the mounting chamber 7-1a. Each vacuum generator 7-9 is inserted into a corresponding insertion hole 7-2a on one side, and the other side penetrates the wall 7-1b of the upper housing 7-1 and communicates with the process hole 7-7. Among them, the section of the wall of the vacuum generator 7-9 corresponding to the installation chamber 7-1a is provided with an air hole that communicates with its internal flow channel.

[0020] In this embodiment, the upper housing 7-1 has an opening on its side that is adapted to the process hole 7-7, and a plug 5 for sealing the process hole 7-7 is installed at the opening.

[0021] It should be noted that the opening and plug 5 on the side of the upper housing 7-1 that are adapted to the process hole 7-7 have two main functions: First, during the assembly stage, the process hole 7-7 can be processed, cleaned, or repaired through the opening to ensure unobstructed airflow; second, during operation, the plug 5 seals the opening to prevent compressed air from leaking from the process hole 7-7, ensuring that all compressed air can be diverted through the process hole 7-7 to each vacuum generator 7-9, maintaining stable airflow pressure, and ensuring vacuuming efficiency.

[0022] In this embodiment, a sealing ring mounting groove is provided on the top of the lower housing 7-2, and a sealing ring 7-8 for sealing the joint gap between the upper housing 7-1 and the lower housing 7-2 is installed in the groove.

[0023] In this embodiment, a sealing ring is installed between the vacuum generator 7-9 and the wall 7-1b of the upper housing 7-1 through the vacuum generator 7-9; a sealing ring is installed between the vacuum generator 7-9 and the insertion hole 7-2a of the lower housing 7-2; thereby improving the sealing performance of the vacuum generator 7-9 with the upper housing 7-1 and the lower housing 7-2.

[0024] In this embodiment, the upper housing 7-1 and the lower housing 7-2 are detachably connected by four screws 8, which are distributed at the four corners of the assembled housing. This detachable connection design facilitates the later inspection and replacement of components such as the vacuum generator 7-9 inside the device, reducing maintenance difficulty.

[0025] In this embodiment, there are four vacuum generators 7-9, which are evenly spaced along the length of the upper housing 7-1 within the mounting chamber 7-1a.

[0026] The working process of a vacuum generator for high-altitude areas provided in Embodiment 1 of this utility model is as follows: (1) Compressed air intake and diversion: External compressed air enters the device through the quick-connect pipe joint 7-3 fixed to the top of the upper housing 7-1, and then flows into the process hole 7-7 in the upper housing 7-1; Since the process hole 7-7 is connected to the four vacuum generators 7-9, the compressed air is divided into four paths through the process hole 7-7 and enters the internal flow channels of the four vacuum generators 7-9 respectively.

[0027] (2) Vacuum chamber formation and entrainment effect: The compressed air entering the vacuum generator 7-9 flows along its internal flow channel. The high-speed compressed air forms a jet inside the vacuum generator 7-9, generating entrainment flow, and thus forming a vacuum chamber inside the vacuum generator 7-9. Since the vacuum generator 7-9 has air holes on its tube wall, the air in the installation chamber 7-1a will be drawn into the vacuum chamber of the vacuum generator 7-9 through the air holes under the action of air pressure difference. (3) Air extraction and transmission in the transfer box; the transfer box of the vacuum toilet system of the EMU is connected to the pagoda connector 7-4 on the outside of the upper shell 7-1 through the pipeline; when a vacuum chamber is formed inside the vacuum generator 7-9, a negative pressure environment is formed in the installation chamber 7-1a. Under the action of negative pressure, the air in the transfer box enters the installation chamber 7-1a through the pagoda connector 7-4, and then enters the vacuum chamber through the air hole in the pipe wall of the vacuum generator 7-9, and mixes with the compressed air. (4) Mixed air discharge and continuous vacuum: After the compressed air in the vacuum generator 7-9 is mixed with the air in the intake transfer box, it continues to flow along the flow channel of the vacuum generator 7-9 and is finally discharged to the outside of the device through the exhaust port 7-6. During this process, the design of four vacuum generators working in parallel (7-9) significantly increases the amount of air extracted per unit time, shortens the time to reach the target vacuum level in the transfer box, adapts to the high-altitude and low-pressure environment of the Sichuan-Tibet Railway, and meets the usage requirements of the vacuum toilet system of the Fuxing bullet train.

[0028] Example 2: A vacuum generator for high-altitude areas, wherein the vacuum generator 7-9 is composed of multiple vacuum expansion tubes connected in series along the airflow direction; the tube wall of the vacuum expansion tube is provided with air holes 7-9a that communicate with its internal flow channel.

[0029] In this embodiment, the vacuum generator 7-9 is composed of a first-stage expansion tube 7-91, a second-stage expansion tube 7-92, and a third-stage expansion tube 7-93 connected in series along the airflow direction; its flow channel cross-section is respectively a full-section gradually contracting structure, a full-section gradually expanding structure, and a full-section gradually expanding structure.

[0030] In this embodiment, on each vacuum generator 7-9, only the air hole 7-9a of the vacuum expansion tube near the process hole 7-7 is not equipped with a one-way valve, while the air holes 7-9a of the other vacuum expansion tubes are equipped with one-way valves.

[0031] In this embodiment, a rubber valve disc is selected as the one-way valve; the edge of the rubber valve disc is provided with a sealing skirt covering the air hole, and the sealing skirt is in contact with the inner wall of the secondary expansion tube or the tertiary expansion tube to increase the sealing area between the rubber valve disc and the tube wall and prevent outside air from leaking from the edge of the valve disc.

[0032] The working principle of a vacuum generator for high-altitude areas provided in Embodiment 2 of this utility model is as follows: (1) When the compressed air flows through the first-stage expansion pipe 7-91 (the entire section of the gradually contracting flow channel) in sequence, it is accelerated. Since there is no one-way valve in the air hole 7-9a of the pipe wall, it can directly entrain the air in the installation chamber. (2) The airflow then enters the secondary expansion tube 7-92 (the entire section of the gradual expansion channel), and the increased negative pressure causes the rubber valve flap with the sealing skirt to open, further drawing in air and preventing leakage; (3) Finally, the airflow enters the three-stage expansion tube 7-93 (the entire section of the gradually expanding flow channel), the one-way valve continuously draws in air and keeps it sealed, stabilizes the vacuum, and finally the mixed airflow is discharged to form a continuous and efficient vacuum.

[0033] (4) The progressive design of the three-stage flow channel with “contraction-expansion-expansion” and the differentiated configuration of the one-way valve achieves the synergistic effect of airflow acceleration, flow rate increase and vacuum stability in high-altitude environments, meeting the needs of the waste collection system.

[0034] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims.

Claims

1. A vacuum generator for high altitude areas, characterized by, include: Upper housing, lower housing, and multiple vacuum generators; the upper housing and lower housing are joined together to form an assembly housing; The top of the upper housing is fixed with a quick-connect tube connector, which has a sealed process hole inside; the interior of the upper housing is separated from the process hole by a wall and has an installation chamber; the outside of the upper housing is provided with a pagoda connector that communicates with the installation chamber. The bottom of the lower housing is fixed to an exhaust port, which has a number of insertion holes running through it along its length that are equal to the number of vacuum generator holes, and the outlet of the insertion hole extends into the exhaust port. Multiple vacuum generators are assembled in the mounting chamber. Each vacuum generator is inserted into a corresponding socket on one side and penetrates the wall of the upper housing on the other side to communicate with the process hole. The vacuum generator tube wall has air holes that communicate with the internal flow channel of the section corresponding to the installation chamber.

2. The vacuum generator for high altitude areas as claimed in claim 1 wherein, The upper housing has an opening on its side that matches the process hole, and a plug for sealing the process hole is fitted at the opening.

3. The vacuum generator for high-altitude areas according to claim 1, characterized in that, A sealing ring mounting groove is provided on the top of the lower housing, and a sealing ring for sealing the gap between the upper housing and the lower housing is installed in the groove.

4. The vacuum generator for high-altitude areas according to claim 1, characterized in that, A sealing ring is installed between the vacuum generator and the wall of the upper housing at the penetration point; a sealing ring is installed between the vacuum generator and the insertion hole of the lower housing.

5. The vacuum generator for high-altitude areas according to claim 1, characterized in that, The upper and lower housings are detachably connected by four screws, which are distributed at the four corners of the assembled housing.

6. The vacuum generator for high-altitude areas according to claim 1, characterized in that, The number of vacuum generators is four, and the four vacuum generators are evenly distributed in the mounting chamber along the length of the upper shell.

7. The vacuum generator for high-altitude areas according to claim 1, characterized in that, Each vacuum generator consists of multiple vacuum expansion tubes connected in series along the direction of airflow; the tube walls of the vacuum expansion tubes are provided with air holes that communicate with their internal flow channels.

8. The vacuum generator for high-altitude areas according to claim 1, characterized in that, The vacuum generator consists of a first-stage expansion tube, a second-stage expansion tube, and a third-stage expansion tube connected in series along the airflow direction; its flow channel cross-sections are respectively a full-section gradually contracting structure, a full-section gradually expanding structure, and a full-section gradually expanding structure.

9. The vacuum generator for high-altitude areas according to claim 7, characterized in that, On each vacuum generator, only the air vent of the vacuum expansion tube near the process port is not equipped with a check valve; all other air vents of the vacuum expansion tubes are equipped with check valves.

10. The vacuum generator for high-altitude areas according to claim 9, characterized in that, The one-way valve uses a rubber valve disc; the edge of the rubber valve disc is provided with a sealing skirt covering the air hole. The sealing skirt fits against the inner wall of the secondary or tertiary expansion tube to increase the sealing area between the rubber valve disc and the tube wall and prevent outside air from leaking from the edge of the valve disc.

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